Cooper pairing of fermions with unequal masses in heavy-fermion systems

Keisuke Masuda*, Daisuke Yamamoto

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We investigate the Cooper pairing between a conduction-band electron (c electron) and an f electron as a possible mechanism of the s-wave superconductivity in heavy-fermion materials. We first obtain an effective Hamiltonian of the system by applying the Schrieffer- Wolff transformation to the periodic Anderson model. The effective Hamiltonian includes spin-exchange and direct interactions between c and f electrons, which play the role of a glue for the s-wave c-f pairing. This pairing may arise from the fact that the strong Hubbard interaction forms the quasiparticle f band near the center of the c band.

Original languageEnglish
Article numberSB010
JournalJournal of the Physical Society of Japan
Issue numberSUPPL.B
Publication statusPublished - 2012 Sept


  • C-f pairing
  • Heavy-fermion systems
  • S-wave superconductivity

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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